FILEUP

F diff --git a/php/database.php b/php/database.php
--- a/php/database.php
+++ b/php/database.php
  
  		}
  		/*returns the file name as it must be in the filesystem relative to the storage root*/
- 		function create_file_node(string $filename,string $note,int $dir_id,string $mimetype,User $user): string
+ 		function create_file_node(string $filename,string $note,int $dir_id,string $mimetype,User $user,$overwrite)
  		{
  			global $storage_root;
+ 			if($filename==NULL)return "error";
  			/*checkout the directory*/
  			$dir_prep=$this->pdo->prepare("
  							select 
  			if($dir_prep->execute()==false)
  			{
  				error_log("could not exedude dir sql statement in create_file_node");
- 				return "error";
+ 				return -1;
  		        }
  
  			$dir=$dir_prep->fetch(PDO::FETCH_ASSOC);
  			if($dir == false)
  			{
  				error_log("create_file_node dir isnt a directory");
- 				return "error";
+ 				return -1;
  			}
  			if($dir["is_directory"]==false)
  			{
  				/*remove this TODO*/
  				error_log("create_file_node: dir is not a directory directory=".print_r($dir).gettype($dir));
- 				return "error";
+ 				return -1;
  			}
  			if($dir["can_edit"]==false)
  			{
  				/*TODO*/
  				/*remove this TODO*/
  				error_log("create_file_node: dir is not modifiable");
- 				return "error";
+ 				return -1;
  			}
  
  			/*check if node with given name exists*/
- 			if($this->check_if_name_is_taken($filename,$dir_id))
+ 			//if($this->check_if_name_is_taken($filename,$dir_id))
+ 			$node_id=$this->get_node_id($filename,$dir_id);
+ 			if($node_id!=NULL)
  			{
- 				error_log("filename taken");
- 				return "filename taken";
+ 				if($overwrite==1)
+ 				{
+ 					$code=$this->get_code_of_node($node_id);
+ 					$prepare=$this->pdo->prepare("
+ 							update nodes
+ 							set type=:type
+ 							where node_id=:id
+ 							");
+ 					$prepare->bindParam(':type',$mimetype);
+ 					$prepare->bindParam(':id',$node_id);
+ 					if($prepare->execute()==false)
+ 					{
+ 						error_log("could not rewrite filenode in create_file_node");
+ 						return "error";
+ 					}else
+ 					{
+ 						return $code;
+ 					}
+ 				}else
+ 				{
+ 					error_log("filename taken");
+ 					return "filename taken";
+ 				}
  			}
  			/*generate the node*/
  			$code=$this->get_random_node_name("");
- 			if($filename==NULL)return "error";
  			$prep=$this->pdo->prepare("insert into nodes(is_directory,relative_path,code,type)
  						   values(false,:root,:code,:type)
  						   ");
F diff --git a/php/upload.php b/php/upload.php
--- a/php/upload.php
+++ b/php/upload.php
      exit(0);
  }
  
- $codename=$database->create_file_node($filename,"",$dir,$mimetype,$user);
+ $codename=$database->create_file_node($filename,"",$dir,$mimetype,$user,$overwrite);
  if($codename=="error")
  {
  	error_log("could not create file_node in upload.php");
  	http_response_code(409);
  	exit(0);
  }
- if($codename=="filename taken" && $overwrite!=1)
+ if($codename=="filename taken")
  {
  	http_response_code(409);
  	exit(0);